Free Biodiversity and Variety of Life MCQs with Answers

• A. Hydra
• B. Crabs
• C. Squid
• D. Earthworm

Explanation: Hydra is a diploblastic organism because it has two germ layers: ectoderm and endoderm.

• A. Flesh fly
• B. Trantula
• C. Blue-ringed octopus
• D. Hummingbird

Explanation: A tetrapod is a vertebrate animal that has four limbs. This includes amphibians, reptiles, birds, and mammals.

• A. Three chambered heart
• B. Externel fertilization
• C. Poikilotherm
• D. Strong pectoral girdle

Explanation: Poikilotherms are organisms that rely on external sources of heat to regulate their body temperature.

• A. Leech
• B. Earthworm
• C. Hook worm
• D. Pin worm

Explanation: Detriyus feeder is an organism that feed off dead or decaying organic matter.

• A. Mode of locomotion
• B. Mode of nutrition
• C. Mode of reproduction
• D. Mode of voice production

Explanation: Birds are very effecient flyers. They can fly at very high altitudes with very high speeds, for long distances.

• A. Alligator
• B. Spiny ant eater
• C. Penguin
• D. Porcupine

Explanation: Prototheria is a subclass of mammals that lay eggs. The only living members of Prototheria are the platypus and two species of echidna…

• A. Cotylosaurs
• B. Whales
• C. Reptiles
• D. Pangolins

Explanation: Cotylosaurs are an extinct group of reptiles that lived during the Carboniferous and Permian periods.

• A. Porous walls
• B. Reproduction
• C. Folding of inner walls
• D. Gastrovascular system

Explanation: The canal system in sponges develops due to folding of inner walls. Sponges are simple animals that do not have a circulatory system.

• A. Chlorenchyma
• B. Mesoderm
• C. Sclerenchyma
• D. Mesenchyme

Explanation: Mesenchyme is a non-cellular layer that is present between the epidermis and the gastrodermis in the body walls of Poriferans.

• A. Whale
• B. Walrus
• C. Shark
• D. Seal

Explanation: Sharks are fish, and they do not have the same characteristics as mammals.

• A. Meththeria
• B. Eutheria
• C. Prototheria
• D. Both eutheria and prototheria

Explanation: The class of mammals that is believed to have a strong resemblance to reptiles is "Prototheria." Prototheria includes the egg-laying…

• A. Kangroo
• B. Bat
• C. Duck bill platy pus
• D. Tasmanian wolf

Explanation: Only bats are placental mammals. Placental mammals give birth to live young that are nourished by a placenta, which is an organ that…

• A. Fish
• B. Reptile
• C. Bird
• D. Amphibian

Explanation: Fish are the only ancient fossil fuel that is still being used today. Coal, oil, and natural gas are all derived from the remains of…

• A. Whale
• B. Elephant
• C. Giraffe
• D. Hippopotamus

Explanation: Except whales, all the mentioned animals are invertebrates.

• A. Mammals and birds
• B. Birds and reptiles
• C. Reptiles and amphibians
• D. Amphibians and fishes

Explanation: Amniotes are birds, reptiles, and mammals. They have characteristics of that of an amniotic egg.

• A. Arthropods
• B. Myriapods
• C. Gastropods
• D. None of these

Explanation: Cephalothorax is present in certain arthropods such as crustaceans and arachnids.

• A. Ectoderm
• B. Endoderm
• C. Mesoderm
• D. All of these

Explanation: Gonads, which are the primary reproductive organs in humans and other animals, develop from the embryonic tissue known as the mesoderm.

• A. Australia
• B. Antarctica
• C. Africa
• D. America

Explanation: Penguins are a group of aquatic, flightless birds living almost exclusively in Antarctica.

• A. Acoelomates
• B. Pseudocoelomates
• C. Both Acoelomates and Pseudocoelomates
• D. Coelomates

Explanation: Acoelomates lack a body cavity, or coelom, between the body wall and the digestive system.

• A. Ectoparasite
• B. Respiratory tract parasite
• C. Intestinal parasite
• D. Urinogenital tract parasite

Explanation: Ascaris lumbricoides is an intestinal parasite of man.